surreptitious /sur-əp-tishˈəs/

1. Done by stealth or fraud
2. Stealthy

• vocalise
• vocalised
• vocaliser
• vocalisers
• vocalises
• vocalising
• vocalism
• vocalisms
• vocalist
• vocalists
• vocalities
• vocality
• vocalization
• vocalizations
• vocalize
• vocalized
• vocalizer
• vocalizers
• vocalizes
• vocalizing
• vocally
• vocal music
• vocalness
• vocalnesses
• vocals